Flat-Panel Image-Processing Pipeline

The ImagingRing, an imaging device with independently rotatable x-ray source and flat-panel detector arms, allows for planar and CBCT acquisitions of arbitrary regions inside the device's cylindrical imaging volume. Supporting independent rotations, the ImagingRing is capable of performing planar and CBCT x-ray acquisitions focusing on arbitrary regions inside the cylindrical imaging volume. Due to the ImagingRing's special geometry, an adjustment of standard methods for generating flat-field planar images is required in order to fit the particular geometric conditions. Our investigations cover on-board multi-level-gain correction considering the calibration time beam profile and correction for bad pixels of the detector. Furthermore, image orientation in table-top coordinates is investigated, considering a nine-degrees-of-freedom flexmap for independent rotations of source and detector. Moreover, our research comprises analytical computation and correction of the beam fluence considering geometric parameters such as distances and incidence angles.

Detailed information about the ImagingRing can be found here.

Key personnel:

  • Mag. Deutschmann H., Institute for Research and Development on Advanced RadiationTechnologies (radART), Paracelsus Medical University, Salzburg, Austria